3 or more songs in the top 40 of Mediabase formats

[Crushcrushchris]

Currently Usher has 3 singles in the top 40 of the pop chart on Mediabase (Yeah, Burn, Confessions Pt. II)

I was just wondering how often has this happened. I doubt this is a first, but I'm guessing that this obviously doesn't and hasn't happened often.

[BlahBlahBlah]

I'm sure this isn't uncommon on the CHR/Rhythmic and Urban charts.

I'm pretty sure at least 50 Cent and R. Kelly have done it.

[Miguelín]

Incubus had three singles in the top 20 of the Alternative chart (Warning, Nice to know You & Wish You Were Here)... I think that has happend less times than three songs from the same artist on the top 40 of the pop chart